General Science - Physics MCQs

Physics Objective (Multiple Choice) General Knowledge & General Science Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examinations.

71. What is the oscillation known as if it can be expressed in terms of single harmonic function?

[A] Harmonic oscillation
[B] Functional oscillation
[C] Regular oscillation
[D] None of the above

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72. What is the S.I unit of frequency?

[A] Second
[B] Watt
[C] Hertz
[D] Joule

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73. Which of the following about S.H.M is correct?

[A] In S.H.M. acceleration is maximum at extreme position
[B] In S.H.M. velocity is minimum at extreme position
[C] Both a and b
[D] None of the above

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74. What is the oscillation in which the loss of oscillator is compensated by the supplying energy from an external source known as?

[A] Free oscillation
[B] Maintained oscillation
[C] Forced oscillation
[D] Damped oscillation

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75. What are those oscillations whose amplitude goes on decreasing with time are known as?

[A] Damped oscillation
[B] Maintained oscillation
[C] Free oscillation
[D] Forced oscillation

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76. What happens to the frequency of the pendulum if it is suspended from the ceiling of the lift moving up ward with constant acceleration?

[A] it decreases
[B] it increases
[C] may increase or decrease
[D] No change

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77. What happens to the time period of the simple pendulum if the solid bob is replaced by a hollow sphere of same radius but half the mass?

[A] time period becomes double
[B] time period remains unchanged
[C] time period becomes half
[D] time period becomes four times

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78. What do we call the wave if the constituents of the medium oscillate perpendicular to the direction of wave propagation?

[A] Transverse wave
[B] Longitudinal wave
[C] Electromagnetic wave
[D] Matter wave

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79. Which of the following is correct about transverse mechanical waves?

[A] they can travel through solids and gases
[B] they can travel through solids but not liquids
[C] they can travel through solids and liquids
[D] they can travel through gases but not solids

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80. For which of the following waves the Doppler effect holds true?

[A] Sound waves
[B] Electromagnetic waves
[C] Both a and b
[D] None

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